Door-bell



(No Model.)

I. E. SHAW.

DOOR BELL.

No. 547,186. Patented Oot. 1, 1895.

ANDREW B GHAHAMJHOTD UTHU-WKSHINGTOILDC.

Unrrnn dramas PATENT @rrrce.

ISAAC E. SHAWV, OF CLOVERDALEOALIFORNIA.

D O O R m B E. L L

SPECIFICATION forming part of Letters Patent No. 547,186, dated October1, 1895.

Application filed May 27, 1895. Serial No. 550,847. (No model.)

To ttZZ whom it may concern:

Be it known that I, ISAAC E. SHAW, a citizen of the United States,residing at Gloverdale, county of Sonoma, State of California, haveinvented an Improvement in Bells or Gongs; and I hereby declare thefollowing to be a full, clear, and eXact description of the same.

My invention relates to a novel construction for bells or gongs.

It consists in certain details of construction, which will be more fullyexplained by reference to the accompanying drawings, in which- Figure 1is a vertical section taken through the bell in a plane through 00 an ofFig. 2. Fig. 2 is a side view.

The object of my invention is to provide a bell with freely-movablehammers adapted to rebound immediately after striking the bell, so as toleave the latter free to vibrate and produce a clear unimpeded tone.

A is the plate, adapted to be secured to the door or other point ofattachment. Through this plate and an interior supporting-plate B passesa shaft 0, having upon the outer end the device for turning it. Thisdevice may be in the form of crossed arms or any other suitable turningmechanism. Upon this shaft is fixed a disk E, having pins F, projectingfrom it, as shown. Below the shaft is a tube, the center of which isdepressed just below the turning cam-shaft, and the ends rise slightlyabove the level of the center. This tube is slotted in the present caseon top and bottom, and a springarm G passes through the slots, extendingfar enough above the tube so that it will be engaged by the projectingpins of the disk or an equivalent cam device, which will press it to oneside or the other. The outer ends of the tube terminate just a shortdistance inside the inner periphery of the bell, and within the tube aretwo freelyrolling balls H. These balls lie normally against thespring-arm, which projects up through the center of the tube. WVhen thehandle is turned in either direction, one of the projecting pins willengage the spring-arm and force it away to one side of the center. Assoon as the pin has passed the upper end of the spring-arm the latter isreleased, and, returning with considerable force on account of itselasticity, it strikes the ball on that side which has rolled to thecenter of the tube. The ball is thus thrown violently outward, so as tostrike the inside of the bell and immediately rebounds and rollsbackward by gravi tation to rest against the spring.

It will be manifest from this construction that the handle may be turnedin either direction, so that the spring may be moved to either side ofthe center, and when released it will operate to force the ball whichhas rolled to the center against the bell. This produces a very clearand satisfactory tone.

The apparatus is extremely simple and easily kept in repair.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. The combination with a gong or bell of a double inclined tube risingfrom the center outwardly, a spring arm having one end secured, and theother end extending through slots or channels made in the tube, ballsrolling freely in the tube upon either side of the spring arm, and a camdisk mounted upon a be drawn to one side or the other and released so asto strike one of the balls, and force it against the interior of thehell.

2. The combination with a gong or bell of a slotted tube incliningupwardlyfrom its center in each direction toward the interior peripheryof the bell, two balls adapted to roll within the inclined tubes, aspring arm extending upwardly between the two balls, a cam shaft andturning device whereby the spring arm may be moved to either side of itscentral position and released so as to strike the ball upon the sidetoward which it is moving and force the latter against the bell fromwhich it recoils and rolls back to the center by gravitation.

In witness whereof I have hereunto set my hand.

ISAAC E. SHAW. Witnesses:

GEO. II. STRONG, S. H. Nounsn.

